Machinery for grinbotg or polishing saw-blades



UNTTED `STATES `PATENT OFFICE.

WILLIAM SOUTHWELL, F KENSINGTON, PENNSYLVANIA.

MACHINERY FOR GRINDING- OR POLISI-IING SAW-BLADES, &c.

Specification of Letters Patent No. 8,929, dated May 4, 1852.

i of Kensington, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Machine for Grinding or Polishing Saws and `other Articles; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing, making a part of this specification, in which- Figure l is a plan of machine. Fig 2 is a transverse section of part of machine. Fig. 3 is a longitudinal elevation.` Fig. 4 is a right end elevation. l l Corresponding letters of reference are used in the different parts of the machine represented o-n the drawing. l

This my inventionconsists in the mode of operating, with two grind stones, for the purpose of grinding or polishing saws, or other articles, at both sides at one and the same time.

A and A represent two grind stones fixed firmly on the shafts@ and in the usual way. The stones A andA arewdirectly opposite to each other, see Fig. l.

C C2 C3 and C?, `are four movable pedestals or boxes which carry Athe shafts o and o. The imder part of each box, C` C2 C? and C4 is planed and fitted, to slide in grooves or l\s"planed `in carriers D D2 D3 and D4, said carriers are bolted to the inside of sliding frame E, see Fig. l. Onthetop of each box C C2 C3 and Ct is fixed a nut o-r carrier, C5 C6 C7 and C8, to receive the screw shafts G and G. l n

E represents a movable or sliding frame, mounted upon planed slides b2 and o3 said slides b2 3 are xed to the upper beams of the main frame of machine, the slides of a slide lathe.

H H are two carriers bolted on the top of frame E, to carry the screw shafts Gr and Gr. Onone end of screw shafts G and Gr is formed alright hand screw, and on the other end of said screw shaft"` G G is formed a left hand screw. The screws Gr and G screw into 1the female screw` nuts or carriers C5, C6, C7, C?. i

I,`I, are two `worm wheels keyed on to screw shafts Gr Gr.

K, K, are two worms, keyed on to shaft L.` Said shaft L extends across the` machine Z similar to (F ig. 1) and is held by carriersM, M.`

Said carriers are bolted to sliding frame E. The handles or Winches N are fixed on each end of cross shaft Lf A rotary motion is communicated to the screws and G, by the above described mechanism, being worked by the hand of the workman, for the purpose of moving the grind stones A and A nearer to or farther from the article required to be ground .or polished. Any degree of force may be applied, necessary to grind steel `or other metals, by this arrangement, and the articles ground can be reduced to the most accurate gage, and even in thickness. The nuts or carriers C5, C6, C7, C8, are arranged and fixed to boxes C, C2, C3, C, so as to allow the position of stones A A to be adjusted, or regulatedthat is to say, when a pair of new stones A A are placed in the machine. It is necessary to have the outer surface or periphery of each stone A and A equal distance from the article intended to be ground or polished, so that when the said stones A and A are forced up to their work, each st one will have the same effect upon the article being ground or polished.

Stone A will grind or polish one side of saw, and stone A will grind or polish the other side of a saw, or other article at the one and same time.

O represents a worm keyed on one end of shaft b.

P is a worm wheel placed on shaft Q., and is held by a feather key.

R is aV carrier` `secured to box C. This carrierRworks in a groove cut in the hub of worm wheel P, so as to hold the said worm wheel P in gear with worm O. The worm wheel P slides on the shaft Q, that is; when the grind stone A is moved to or fromthe center of machine, by the screws G and G.

S S are two eccentrics, keyed on the ends of shaft Q,"(one of these shown on Fig. 4).

S3 and St represent two movable boxes or carriers, the lower part ofV said carriers S3 S4 are drilled and tapped, to` receive the screws U and U. A lslot is cut in each of the boxes or carriers S3 and S4 (see Fig. 4) into which one of the eccentrics S S revolve, (one on each end of machine).

T T are two carriers fixed to movable frame E, into which the shaft Q, revolve.

When the machine is in operation, the boxes orl carriers S3 and SL are held staeccentrics is plainly tionary by screws'U and U', and by the eccentric S S receiving a rotary motion from the before described worm O and worm wheel P. A traversing motion is given to the frame E grind stones A and A and all other parts that are fixed to said frame E. for t-he purpose of bringing every part of the periphery of grind stones A and A in equal contact with the article being ground or polished, thereby preserving a true cylindrical surface, on the face of both stones.

W' represents a miter wheel keyed on the end of screw U. W2 represents a miter wheel keyed on the end of screw U' (the shaft of said screw U a extends across the machine, (see Fig. l) so that the workman can turn the said screw U and all connected thereto from either side of machine.)

W3 and W4 are two miter wheels keyed on shaft Y.

X X2 are two carriers firmly fixed to main frame Z to carry the shaft Y.

The handles or Winches a2 and a3 are fixed on the ends of screw shaft U.

The screws U and U are placed in carriers U3 and U4 said carriers are bolted to main frame Z. The screws U and U work in the lower part of eccentric carriers, or boxes: S3 4and S4. The screw U being screwed into the box S3 and screw W being screwed into the box S4, receive equal motion by they said screws being geared together by the miter wheels W VW2 W3 and W3.

It will now be perceived, by giving a rotary mot-ion to screws U and U the eccentric carriers or boxes S3 and S3, are moved nearer to, or farther from the frontvof ma I chine, and in consequence of the eccent-rics S, S being placed in the slot of said carriers, or boxes S3 and S4 as before explained: the frame E, and all connected thereto, are moved from one side of machine to the other. The stones A and A are thereby placed opposite either of the saw frames when required. 5 i y V represents a double sided perpendicular slide securely xed in the center of machine, V and V2 are two slides also secured to machine. The upper ends of slides V V and V2 are secured to the top of frame D3,

the lower ends of saidv slides are bolted to the cross beam of main frameZ (Fig. 2).

A said saws, it will be seen, are thus placed between the two stones A and A so as to reand H2 being connected to the upper levers or beamsl, saw frames F F2 and iiy wheels K and K2 respectively. Each saw frame (Fig. 2) is separate and detached from the other.

M is a shaft held by carriers M2 and'M3. N' is a shaft similar to shaft M carried by carriers M3 and M3. The flywheel K' is keyed on shaft M the fly wheel K2 is keyed on shaft N. The pulley L is also keyed on shaft M' the pulley L3 is keyed on shaft N.' the pulley L2 is loose on the end of shaft M. A slot is cut in the fly wheelsK and K2 for the purpose of moving the crank pins K3 nearer to or farther from the center of said fly wheels K or K2, to give a longer or shorter stroke to saw frames F and F2 according to the length of the article to be ground or polished.

P1 represents the belt that communicates a rotary motion from pulley on main shaft R to the pulleys L L2 or L3 as the case may be.

S3 and S6 are two balance weights. One of these weights is secured `to each of the levers or beams I', to counterbalance the weight of saw and frame. y

. From the above description it will be perceived, that either of the saw frames may be put in motion, by simply putting the belt P on lto either of the fast pulleys L. or L3 as required. l i

T and T2 are two pulleys keyed on driving shaft R. These pulleys are required to be considerably broader, than those now in common use, to admit of the stones A and A being worked on either sidev of'machine, (that is opposite either saw frame). When the frame E is crossing` from one side of machine to the other: the belts, V3 andkV4 change'their posit-ion on the pulleys T and T2.

W5V and W6 Vare ltwo pulleys carried in swinging frames X thesepulleys keep their respective belts tight, to counteract the movement of stones A and A', for it will vbe seen that, as the stones A and A are one side, is perfectly counteracted by the bite or action of the other stone, on the other surface of said article, so in point of fact, the saw or other article, being ground or polished, has no tendency to be drawn in, or forced out, by either stone.

Water may be applied, and suitable boxes fixed under the stones to receive the'refuse as usual.

It will be perceived by the foregoing description, that the machine is essentially a double one, in every respect,-both sides of a saw are ground or polished at the same time,and while one saw is being ground or polished as described, the operator can place one in the second frame to be ground or polished. It is not absolutely necessary to have two saw frames as shown. I prefer having two, as described for sake of economy of time. By moving the stones across the frame E, the operator can st-and close to his work while removing and replacing a saw the stones in such case need not be stopped, when an article is finished.

This, my improved grinding machine may be truly called a labor saving machine. Saws and other articles ground on the old system require the physical powers of man to be used to their utmost limit. In fact, all the pressure required, with few exceptions is put on by manual force. Few men except practical grinders are aware of the vast amountof labor and suffering endured by grinders of the present day. The average term of life, of practical grinders is found to be under thirty five (35) years. The work when done on this machine will be of better quality than it is possible for man to make, independent of machinery. It is calculated that by the attendance ,of one man, this machine will do as much work as eight (8) men perform on the old system.

Having now described the nature of my invention and the manner in which the same may be performed it is to be understood, that I do not limit myself to the particular arrangement of machinery as described for the grinding or polishing long mill saws, as I am quite aware that different forms and arrangements will be found necessary for effecting the same objects in machines for grinding or polishing articles of various descriptions and to which these improvements may be applied, but they will be such as any experienced workman may at once understand from the description here given, and will be governed by the nature of the work requireda's for instance, where short articles are required to be `ground or polished, the frames (that carry the saws) are `dispensed with. Trowels, knives, of various description, square blades, hand and other saws and numberless other thingsmay bel held by pincers or tongs, similar to those used by white smiths, and placed between two stones, to be ground or polished. Various kinds of laps emery glazers, buffers and other similar articles can be arranged on this principle. iCircular saws and other similar articles are to be fixed on a revolving mandrel by washers nut and screw, when ground or polished on both sides simultaneously by this improved machine. In such case the mandrel would serve the same purpose for the circular saw, that the reciprocating frame or saw carriage would for the long saw as herein shown and be in that respect its equivalent.

l. The combination of two grind stones or their equivalents, revolving in the direction herein made known, for the purpose of Y grinding or polishing twoV sides of a saw or other article, simultaneously, with a reciprocating frame, or its equivalent, for the purpose of holding the article beingV ground or polished, whereby the tendency of either stone, to move the article, is counteracted by the action of the other stone and the same force is thereby required to reciprocate the article in either direction as described.

2. The combination of the right and left hand screws, carriers and nuts for said screws, movable pedestals or boxes, together with the cross shaft, worms, worm wheels and `handles substantially as set forth, for the purpose of moving two grind stones, or their equivalents simultaneously, against opposite sides of an article being ground or polished as described.

3. I do not claim giving an automatic traverse motion to grind stones, but what I do claimis the arrangement of screws, miter wheels handles, eccentrics eccentric boxes and movable frame, substantially as herein described, whereby I am enabled at any time to move the grind stones or their equivalents, entirely across the machine for the purposes set forth, without interfering with automatic traversing motion which is given to the said stones, irrespective of their pre cise position with reference to either saw frame or either saw, or other articles fixed in said frames.

4. The arrangement in the same machine, of two sets of reciprocating frames either of which can be stopped without eiecting the other, and a carriage, whereby the grind stones can be caused to move from one frame to the other by which arrangement one saw can be ground or polished while another is being adjusted into place.

WILLIAM SOUIHVVELL.VV [1.. s.]

Witnesses: Y t

JAMES ECOLES, EDWARD EVANS. 

